diff --git a/pyproject.toml b/pyproject.toml
index 1fc2266..c530189 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "smolagents"
-version = "1.3.0.dev"
+version = "1.4.0.dev"
 description = "🤗 smolagents: a barebones library for agents. Agents write python code to call tools or orchestrate other agents."
 authors = [
   { name="Aymeric Roucher", email="aymeric@hf.co" }, { name="Thomas Wolf"},
diff --git a/src/smolagents/__init__.py b/src/smolagents/__init__.py
index 055fba7..f457b7e 100644
--- a/src/smolagents/__init__.py
+++ b/src/smolagents/__init__.py
@@ -14,7 +14,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-__version__ = "1.3.0.dev"
+__version__ = "1.4.0.dev"
 
 from typing import TYPE_CHECKING